<li :class="{'isleaf':!tree.children,'collapsed':(tree.collapsed)}">
    <a class="node-menu-name"  v-on:click="nodeClick(tree)">
        <i class="fa fa-cubes"></i>
        {{tree.menuName}}
    </a>
    <ul :level="tree.level" v-if="tree.children">
        <m-side-tree class="m-side-tree" v-if="tree.children" :tree="item" :key="item.menuName" v-for="item in tree.children" v-on:abc="abcd()"></m-side-tree>
    </ul>
</li>